TY - JOUR
T1 - Catalytic upgrading of pretreated algal oil with a two-component catalyst mixture in supercritical water
AU - Xu, Yuping
AU - Duan, Peigao
AU - Wang, Bing
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Single-component catalysts present opportunities and challenges for upgrading crude algal bio-oil in supercritical water. Herein, we report the coordination of the action of two heterogeneous catalysts to upgrade pretreated algal oil to a hydrocarbon-rich fuel. The activities of several different catalyst mixtures for hydrothermal hydrodeoxygenation and hydrodenitrogenation of pretreated algal oil at 400°C for 4h were determined in a batch reactor. The yield of upgraded oil produced using each catalyst mixture ranged from a low of 63.2wt.% in the Ru/C+Rh/γ-Al2O3-catalyzed reaction to a high of 77.2wt.% in the Ru/C+Mo2C-catalyzed reaction. Coke production was controlled in the presence of most of the two-component catalyst mixtures under these hydrothermal conditions. All the two-component mixtures exhibited excellent performance with respect to deoxygenation, denitrogenation, and, in particular, desulfurization. Ru/C+Mo2C, Ru/C+Pt/γ-Al2O3, and Ru/C+Pt/C performed best with respect to deoxygenation, denitrogenation, and desulfurization and produced upgraded oils with O, N and S contents of 0.1, 1.8, and 0.065wt.%, respectively. The upgraded oil produced with Ru/C+Mo2C retained 89.7% of the heating value of the original pretreated oil and contained 98.5% of the material boiling below 450°C. The upgraded oils consisted mainly of saturated hydrocarbons, which accounted for no less than 40% of the total peak area for the majority of the oils. Thus, we view the two-component catalyst mixture as a promising strategy for upgrading bio-oils derived from microalgae.
AB - Single-component catalysts present opportunities and challenges for upgrading crude algal bio-oil in supercritical water. Herein, we report the coordination of the action of two heterogeneous catalysts to upgrade pretreated algal oil to a hydrocarbon-rich fuel. The activities of several different catalyst mixtures for hydrothermal hydrodeoxygenation and hydrodenitrogenation of pretreated algal oil at 400°C for 4h were determined in a batch reactor. The yield of upgraded oil produced using each catalyst mixture ranged from a low of 63.2wt.% in the Ru/C+Rh/γ-Al2O3-catalyzed reaction to a high of 77.2wt.% in the Ru/C+Mo2C-catalyzed reaction. Coke production was controlled in the presence of most of the two-component catalyst mixtures under these hydrothermal conditions. All the two-component mixtures exhibited excellent performance with respect to deoxygenation, denitrogenation, and, in particular, desulfurization. Ru/C+Mo2C, Ru/C+Pt/γ-Al2O3, and Ru/C+Pt/C performed best with respect to deoxygenation, denitrogenation, and desulfurization and produced upgraded oils with O, N and S contents of 0.1, 1.8, and 0.065wt.%, respectively. The upgraded oil produced with Ru/C+Mo2C retained 89.7% of the heating value of the original pretreated oil and contained 98.5% of the material boiling below 450°C. The upgraded oils consisted mainly of saturated hydrocarbons, which accounted for no less than 40% of the total peak area for the majority of the oils. Thus, we view the two-component catalyst mixture as a promising strategy for upgrading bio-oils derived from microalgae.
KW - Crude bio-oil
KW - Supercritical water
KW - Two-component catalyst mixture
KW - Upgraded bio-oil
KW - Upgrading
UR - https://www.scopus.com/pages/publications/84928687166
U2 - 10.1016/j.algal.2015.03.011
DO - 10.1016/j.algal.2015.03.011
M3 - 文章
AN - SCOPUS:84928687166
SN - 2211-9264
VL - 9
SP - 186
EP - 193
JO - Algal Research
JF - Algal Research
ER -